The invention relates to the technical field of automatic welding and in particular relates to a battery piece tray for automatic welding. The battery piece tray for automatic welding comprises a placing disc. A plurality of placing slots are uniformly formed in the placing disc in an equally spaced manner, a cover plate is arranged at the upper end of the placing disc, a pressure plate is arranged in the cover plate, a plurality of through holes are uniformly formed in the pressure plate in an equally spaced manner, the diameters of the through holes are smaller than the inner diameters of the placing slots, first connecting pieces are fixed on two sides of the pressure plate, second connecting pieces are arranged at the upper and lower ends of the inner side of the cover plate, pin roll holes are formed in the second and first connecting pieces, the pressure plate is connected to the cover plate by inserting L-shaped pin rolls into the corresponding pin roll holes, pressure blocks are fixed at four corners of the bottom face of the pressure plate, adjusting barrels are fixed at four corners of the placing disc, a reset spring is fixed on the inner wall of the bottom end of each of the adjusting barrels, an adjusting plate is connected to the upper end of each of the reset springs, and two sides of each of the adjusting plates are slidably connected to the inner wall of the corresponding adjusting barrel. The battery piece tray for automatic welding provided by the invention solves the problem that an existing lithium battery fixing device is complicated in operation and can only fix a small quantity of batteries each time.